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Table 1 Study characteristics

From: Psychosocial areas of worklife and chronic low back pain: a systematic review and meta-analysis

Reference N Occupation Country Mean age (Years) Females (%) Design Response rate Exposures Study quality
Aghilinejad, 2015 [4*] 185 blue collar Iran 36 0 P unknown W + C + S +
Alexopoulos, 2003 [50*] 351 pink collar Greece 37 81 CS 90% W + C (DA) + S (C, SS) +
Brage, 2007 [51*] 1152 mixed collar Norway 35 50 P 98% (permission of register follow-up) C +
Cameron, 2008 [52*] 303 pink collar Canada 52 96 CS 61% C (DA)
Elders, 2001 [53*] 288 blue collar Netherlands 36 0 CS 85% (baseline) W + C
Eriksen, 2004 [54*] 4266 pink collar Norway 45 96 P 62.3% (baseline) 89.3 (follow-up 1) 85.6 (follow-up 2) S (S) +
Eriksen, 2006 [47*] 779 pink collar Netherlands 40 84 CS 60% W + C (DA, SD) + S (C, SS) +
Feng, 2007 [55*] 244 pink collar China 43 100 CS 91.3% W + C (DA, SD) + S (C, SS) +
Hooftman, 2009 [56*] 1259 mixed collar Netherlands 36 31 P 87% (baseline) 92% (for at least one follow-up) W + C (SD) + S (C, SS) +
Hoogendoorn, 2001 [57*] 861 mixed collar Netherlands 36 30 P 87% (baseline) W + C (DA, SD) + S (C, SS) +
Latza, 2002 [58*] 488 blue collar Germany 32 0 P 85.5% (follow-up) [for baseline not determined] W + C (DA) + S +
Matsudaira, 2012 [59*] 836 mixed collar Japan 44 12 P 86.5% (baseline) 71.6% (follow-up 1) 84.0% (follow-up 2) W + C (DA, SD) + S (C, SS) +
Matsudaira, 2015 [60*] 171 blue collar Japan 42 29 P 86.5% (baseline) 71.8% (follow-up) R ++
Melloh, 2013 [61*] 169 mixed collar New Zealand 36 62 P 74% (baseline) 54% (across all follow-ups) W + S
Messing, 2009 [62*] 7757 mixed collar Canada 36 42 CS 82% / 84% (interviewer-administered / self-administered questionnaire) W
Tsigonia, 2009 [63*] 102 pink collar Greece 38 93 CS 90% W + C (SD) + S (C) +
van den Heuvel, 2004 [64*] 787 mixed collar Netherlands 36 31 P 87% (baseline) W + C (DA, SD) + S (C, SS) +
Violante, 2004 [65*] 858 pink collar Italy 36 100 CS 95.2% W + R
  1. N Sample size, Age Mean age in sample, Females Percentage of females in sample, P Prospective, CS Cross-sectional; Exposures assessed: W Workload, C Control, DA Decision authority, SD Skill discretion, S Social support, C Colleague, SS Supervisor, R Reward, ++ = high, + = medium, – = low